Recoil-check.



F. J. MELLEN & B. A. EDWARDS.

RECOIL CHECK. APPLICATION FILED NOV.11, 1908.

Patented June 15, 1909.

I an 0 .up or resist vibratory movement of attached .the movement of apiston within the c linder justable clip or clamp 4 is mountedupon theFREDERICK J. HELL-EN AND BURTON M FETCE;

A. EDWARDS, OF BELOIT, WISCONSIN.

REGOIL-CHECK.

Specification of Application filed November 1 To all whom it mayconcern:

Be it known that we, FREDERICK J. MEL- LEN and BURTON A. EDWARDS,citizens of the United States, both residing at Beloit, in the county ofRock and State of Wisconsin, have invented certain new and usefulImrovements in Recoil-Checks, of which the following is a specification.

The object of our invention is to provide a recoil check or compensatoradapted to take or relatively movable parts of an object or objects andis more particularly designed for use in connection with vehicle bodieswhereby a violent vibratory movement of the body is prevented and theshock eliiciently resisted by the recoil check.

The invention contemplates the construction and arrangement of theseveral parts of a check device comprising a cylinder wherein isretarded or partially resisted by a vacuum created by its movement andfurther resisted at apredetermined point by a spring interposed betweenthe piston and end closure of the cylinder.

For a full understanding of the invention and the merits thereof andalso to acquire a knowledge of the details of construction and of themeans for effecting the result, reference is to be had to the followingdescription and accompanying drawings, in which Figure 1 is a sideelevation of the device mounted u on a vehicle; Fig. 2 is a verticalsectional view of the device; and, Fig. 3 is an enlarged detailillustration.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by he samereference characters. I f

Referring to the drawings, the numeral 1, designates a cylinder threadedinternally for a short distance from both ends, one end of which isclosed by an externally threaded cap 2 screwed-into the internallythreaded cylinder end.

3 designates a transverse rib integrally a art of the cap 2 and isdesigned to form a 'nk by which thedeviee is secured to the.

vehiclefraime. As shown in Fig. 1, an advehicle frame 5 and the rib 3 isinserted between the extremities of the clamp and retained b a pin 6which protrudes through registering openings in said rib and clam'pextremities. The opposite end of the cylin- Letters Patent. PatentedJune 15, 1909.

1, 1908. Serial No. 462,077.

der is closed by an externally threaded cap or head 7 screwed into theinternally threaded cylinder end, and said cap or head is formed with aninclined or conical opening 8 designed as a stnfling box in whichsuitable packing 9 is placed and through which the piston rod 10 iserniitted to move longitudinally. The cisplacement of the packing 9within the stuffingbox is prevented by a washer 11 which rests flat uponthe inner side of the cap 7 and is retained thereagainst by a spiralspring 12 interposed between said washer and the piston 13 carried atthe inner extremity of the piston rod 10. Said piston 13 preferablycomprises two Washers 14 and 14 of slightly smaller diameter than thecylinder 1, retained at the inner end of the piston rodon one side bythe spring 12, and at the opposite side by the head 15 formed upon theextremity of said rod. A leather or other flexible washer 16 designed"as packing is placed between the washers and deflected at its edge tooccupy the space formed" between the washers 14 and the inner surface ofthe cylinder. The parts are so constructed and arranged that avacuunrchaiiiber 17 is formed between the piston 13 and the end of thecylinder closed by the cap 2, and an air compression chamber 18 betweenthe iston 13 and the end of the cylinder closed y the cap 7. l

The numeral 19 designates a link or bailshaped member secured to theexposed end of the piston rod 10 and to which astra or chain 20 isfastened, which isrdesigned to extend below the vehicle axle 21 and.con-- nect the piston rods 10 of two oppositely arranged cylinders orcheck devices. When the device is arranged upon a vehicle, the cylindersare secured to the vehicle frame 5 at both sides of the axle 21 as shownin Fig. 1

and any desired distance therefrom by the adjustable clamps 4. By suchan arrangement, the tension of the strap 20 is adjusted to regulate theoperative position of the device to effect and reduce the vibratorymovement of the vehicle frame, and to avoid sudden or violent shocks.

The operation of the device when secured to' a vehicle is as follows:The cylinders are attached to the vehicle frame 5 at one extrer'nity andthe piston rods lOconn'ected by the strap 20, said strap extending underthe axle 21 at the desired tension and regulated by movement of thead'ustable clamp upon the vehicle frame as illustrated in dotted linesin Fig. 1. Upon extreme vibratory movement or sudden shock to either theaxle or frame, the frame in its upward movement or the axle in itsdownward movement away from the frame, will cause the strap to tighten,and the pistons operating within the cylinder incident to the stressplaced upon the straps, will effectually take up and reduce the violenceof such vibratory movement or shock, consequent upon the vacuum createdin chamber 17 by movement of the piston 13. The resisting efficiency ofthe vacuum formed within the cylinder is further increased by-thetension placed upon the s ring-12' and the compression of air within t echamber 18 upon movement of the piston 13, and the piston'rod and pistonare re-v turned to their normal positions by the action of said springand compressed air upon release of the tension exerted on the strap 20.

It will of course be understood that the device may be secured to anyconvenient part of a vehicle frame or body andwhen secured in its properrelative position to a vehicle axle, will effectually prevent severestrain upon the springs and connected parts of the vehicle, whereby byits gradually increasing resisting ower the effect of a violent shock isgradua lyjbut effectually counteracted.

Having thus described the invention, what is claimed as new is,:-

1. A check device comprising a cylinder provided at one end with a cap,said cap bemg formed with acentral recessed opening designed to form astufling box, a piston ro operatmgthroughthe o eningin said cap,-

packing in said recesse opening and surrounding said piston rod,'apiston carried by I the piston rod, a washer mounted upon the piston rodand designed as a closure for the recessed opening in said cap, a spiral.spring carried by the piston rod and interposed between said piston andwasher to retain the latter in its proper position against the cap andto hold the iston in its normal position Within the charn er, and a capor closure for the opposite end of said cylinder.

2. A check device comprising a cylinder provided at one end with a cap,said cap bemg formed with a central recessed openin designed to form astufling box, a piston rod operating through the o ening in said cap,packing in said recesse roundingsaid piston'rod, washers secured to theinner extremity of the piston rod, a fleJiible washer orpackinginterposed between 1' said washers and extending beyond themarginthereof designed to form an air-tight frictional contact with the innersurface of the cylinder, a washerlmounted upon the pistonirod anddesigned as a closure for the recessed opening in said cap, a spiralspring carried bythe piston rod and interposed between said piston andwasher to retain the latter in its proper position against the cap andto ,hold the iston in its normal position within the charn er, and a capor closure for the opposite end of said cylinder;

In testimony whereof we afiix our signa tures in presence of twowitnesses.

IDA- I. WARD.

opening and sur-

